I have the opposite problem on my zx6r. I have a hum, with slight braking, but when I brake hard it's completely silent. no vibration, not felt, but there must be if it's a loud hum. some what high pitched.

Since he said his braking is fine at high speeds, wouldn’t a warped rotor be noticeable at higher speeds and not so noticeable at slow speeds of 10-20 kph as the OP posted? That’s always been my experience and I’m riding a bike now that has a slightly warped rotor.

And to the OP, when you brake “hard” at 10 or 20 kph you tend to stop on a dime so I don’t think you’d notice a warped rotor braking “hard” at such slow speeds. Just my $.02. What am I missing?

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